Enforce ticket references in Mercurial commit messages in Sourcetree on OS X

.hgrc

[ui]
username=John Doe <johndoen@example.com>

[hooks]
pretxncommit = ~/bin/requireCaseId.sh

requireCaseId-JIRA.sh

#!/bin/bash
# Check that a commit contains ticket references

# Path to hg executable.
HG_BIN="/Applications/SourceTree.app/Contents/Resources/mercurial_local/$HG"
PATTERN="(\<[A-Z]+-[0-9]+|(none)) +(.*)+|(^merge)|(tag .+ for changeset [0-9a-f]{12})"

$HG_BIN log -r $HG_NODE:$HG_NODE --template {desc} | egrep -q "$PATTERN"
result=$?

if [ $result -ne 0 ]; then
  echo
  echo 'Missing JIRA ticket number, please add "PROJECT-1234" or "PROJECT-none".

Ensure you add a meaningful commit message as well.'
  echo
fi

exit $result

requireCaseId.sh

#!/bin/bash
# Check that a commit contains ticket references

# Path to hg executable.
HG_BIN="/Applications/SourceTree.app/Contents/Resources/mercurial_local/$HG"
PATTERN="(\<Case:? *[0-9]|(none))|(^merge)|(tag .+ for changeset [0-9a-f]{12})"

$HG_BIN log -r $HG_NODE:$HG_NODE --template {desc} | egrep -q -i "$PATTERN"
result=$?

if [ $result -ne 0 ]; then
  echo
  echo 'Commit message does not contain "Case (number)" or "Case: none"'
  echo
fi

exit $result